CVE-2003-1026Internet Explorer Vulnerability
Internet Explorer 5.01 through 6 SP1 allows remote attackers to bypass zone restrictions via a javascript protocol URL in a sub-frame, which is added to the history list and executed in the top window's zone when the history.back (back) function is called, as demonstrated by…
Published Jan 20, 2004 · Updated Apr 15, 2026
Key Facts
Patch immediately- CVE-2003-1026 is a critical-severity vulnerability (CVSS 9.3 v2) affecting Ie (Microsoft), Internet Explorer (Microsoft).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 39% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v2
9.3
AV:N/AC:M/Au:N/C:C/I:C/A:C
EPSS (30-day exploit likelihood)
39%
Higher than 98.5% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
40/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
- advisoryVU#784102
Description
Internet Explorer 5.01 through 6 SP1 allows remote attackers to bypass zone restrictions via a javascript protocol URL in a sub-frame, which is added to the history list and executed in the top window's zone when the history.back (back) function is called, as demonstrated by BackToFramedJpu, aka the "Travel Log Cross Domain Vulnerability."
Affected Products
10 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| IeMicrosoft | 6.0-sp1 | n/a |
| Internet ExplorerMicrosoft | 5.0, 5.0.1, 5.0.1-sp1, 5.0.1-sp2, 5.0.1-sp3, 5.5, 5.5-sp1, 5.5-sp2 | n/a |
Timeline
Publicly disclosed
Jan 20, 2004
Last updated
Apr 15, 2026
Weakness Type
- CWE-264
References
- advisoryVU#784102
- exploitExploitDB-151
- other20031125 BackToFramedJpu - a successor of BackToJpu attack
- other20031201 Comments on 5 IE vulnerabilities
- otherMS04-004
FAQ
Common Questions.
Internet Explorer 5.01 through 6 SP1 allows remote attackers to bypass zone restrictions via a javascript protocol URL in a sub-frame, which is added to the history list and executed in the top window's zone when the history.back (back) function is called, as demonstrated by BackToFramedJpu, aka the "Travel Log Cross…
Affected: Ie (Microsoft) versions 6.0-sp1; Internet Explorer (Microsoft) versions 5.0, 5.0.1, 5.0.1-sp1, 5.0.1-sp2, 5.0.1-sp3, 5.5, 5.5-sp1, 5.5-sp2. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2003-1026 On Your Attack Surface?
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